the gps measured sitec caused by the very intense solar flare on july 14, 2000
文献类型：期刊论文
| 作者 | Wan WX ; Liu LB ; Yuan H ; Ning BQ ; Zhang SR |
| 刊名 | SPACE WEATHER
 |
| 出版日期 | 2005 |
| 卷号 | 36期号:12页码:2465-2469 |
| 关键词 | 数字电话:6636,数字媒体:4733,显示设备:3753,数字化:2424,关键技术:2250,复合视频:1762,终端:1454,标牌:1326,数字编码:884,数码相机:868space weather GPS total electron content solar flares sudden ionospheric disturbances |
| ISSN号 | 0273-1177 |
| 中文摘要 | 多线程并发是提高系统性能的常用手段,文章提出了一种用信号量的不对称P/V操作来设计多线程并发算法的新思路,这种思路适合于设计多线程同步程序以解决某些具有复杂同步语义要求的问题,而这些问题用传统的方法很难得到简洁高效的求解。为了演示这种新思路的特点和优点,笔者对几个常见问题(读写锁、排队锁和记录锁)给出了新的算法设计以及实现。实验数据表明,采用这种思路设计的算法在算法复杂度,读写速度和资源使用方面相对于传统的算法存在较大优势。 |
| 学科主题 | Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences |
| 收录类别 | SCI ; SCIENCEDIRECT ; CNKI ; EI |
| 语种 | 英语 |
| 公开日期 | 2011-07-28 |
| 附注 | This work studies the sudden increases in total electron content of the ionosphere caused by the very intense solar flare on July 14, 2000. Total electron content (TEC) data observed from a Global Positioning System (GPS) network are used to calculate the flare-induced TEC increment, delta TECf, and variation rate, dTEC(f)/dt. It is found that both dTEC(f)/dt and delta TECf are closely related with the solar zenith angles. To explain the observation results, we derived a simple relationship between the partial derivative of the flare-induced TEC, partial derivative TECf/partial derivative t, which is a good approximation for dTECf/dt, and the solar zenith angle chi as well as the effective flare radiation flux If, according to the well-known Chapman theory of ionization. The derived formula predicted that OTECf/partial derivative t is proportional to If and inverse proportional to Chapman function ch(chi). This theoretical prediction not only explains the correlation of dTEC(f)/dt and delta TECf with chi as shown in our TEC observation, but also gives a way to deduce I-f from TEC observation of GPS network. Thus, the present work shows that GPS observation is a powerful tool in the observation and investigation of solar flare effects on the ionosphere, i.e., the sudden ionospheric disturbances, which is a significant phenomenon of space weather. (c) 2005 COSPAR. Published by Elsevier Ltd. All rights reserved. |
| 源URL | [http://124.16.136.157/handle/311060/12444]  |
| 专题 | 软件研究所_软件所图书馆_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wan WX,Liu LB,Yuan H,et al. the gps measured sitec caused by the very intense solar flare on july 14, 2000[J]. SPACE WEATHER,2005,36(12):2465-2469. |
| APA | Wan WX,Liu LB,Yuan H,Ning BQ,&Zhang SR.(2005).the gps measured sitec caused by the very intense solar flare on july 14, 2000.SPACE WEATHER,36(12),2465-2469. |
| MLA | Wan WX,et al."the gps measured sitec caused by the very intense solar flare on july 14, 2000".SPACE WEATHER 36.12(2005):2465-2469. |
入库方式： OAI收割
来源：软件研究所
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